Home / 129,685.20-179,010.21-75,987.60

Finding the Fourth Proportional to 129,685.20, 179,010.21 and 75,987.60

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Solution

The fourth proportional to 129,685.20, 179,010.21 and 75,987.60 is: 104,889.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,685.20 : 179,010.21 = 75,987.60 : x
  2. Step 2: Convert to fraction form
    129,685.20/179,010.21 = 75,987.60/x
  3. Step 3: Cross multiply
    129,685.20x = 179,010.21 × 75,987.60
  4. Step 4: Simplify right side
    129,685.20x = 13,602,556,233.40
  5. Step 5: Solve for x
    x = 13,602,556,233.40/129,685.20
  6. Step 6: Final answer
    x = 104,889.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.